added getCharacteristic()

package.json

@@ -18,12 +18,15 @@
     "@babel/plugin-syntax-bigint": "^7.8.3",
     "@babel/preset-env": "^7.28.5",
     "babel-loader": "^10.0.0",
+    "pkg": "^5.8.1",
     "webpack": "^5.103.0",
     "webpack-cli": "^6.0.1",
     "webpack-node-externals": "^3.0.0"
   },
   "dependencies": {
     "dbus-next": "^0.10.2",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "usocket": "^1.0.2",
+    "x11": "^2.3.0"
   }
 }

src/bluez-gatt.js

@@ -82,6 +82,7 @@ export class BaseCharacteritic extends BaseInterface {
     super(bus, path, "org.bluez.GattCharacteristic1");
     this.UUID = uuid;
     this.Flags = flags;
+    this.service = service;
     this.Service = service.path;
   }
 

src/bluez.js

@@ -26,6 +26,25 @@ export class Bluez {
       }
     }
   }
+
+  async getDeviceByServiceUUID(uuid) {
+    const om = await this.getObjectManager();
+    const objs = await om.GetManagedObjects();
+
+    for (const [path, ifaces] of Object.entries(objs)) {
+      if (
+        Object.hasOwn(ifaces, DEVICE_IFACE) &&
+        Object.hasOwn(ifaces[DEVICE_IFACE], "UUIDs")
+      ) {
+        const found = ifaces[DEVICE_IFACE]["UUIDs"].value.findIndex(
+          (u) => u === uuid
+        );
+        if (found !== -1) {
+          return new BluezDevice(this.bus, path);
+        }
+      }
+    }
+  }
 }
 
 class BluezDevice {
@@ -44,6 +63,11 @@ class BluezDevice {
     return props.Get(DEVICE_IFACE, name);
   }
 
+  async getValue(name) {
+    const p = await this.getProperty(name);
+    return p.value;
+  }
+
   async isConnected() {
     const c = await this.getProperty("Connected");
     return c.value;
@@ -60,4 +84,22 @@ class BluezDevice {
     const device = o.getInterface(DEVICE_IFACE);
     await device.Disconnect();
   }
+
+  async getCharacteristic(uuid) {
+    const o = await this.dbus.getProxyObject("org.bluez", "/");
+    const om = o.getInterface("org.freedesktop.DBus.ObjectManager");
+    const managed = await om.GetManagedObjects();
+
+    for (const [path, ifaces] of Object.entries(managed)) {
+      if (
+        path.startsWith(this.path) &&
+        Object.hasOwn(ifaces, "org.bluez.GattCharacteristic1") &&
+        Object.hasOwn(ifaces["org.bluez.GattCharacteristic1"], "UUID") &&
+        ifaces["org.bluez.GattCharacteristic1"]["UUID"].value === uuid
+      ) {
+        console.log(path);
+        // construct gatt char.I
+      }
+    }
+  }
 }

src/ftms-service.js

@@ -1,6 +1,11 @@
 import { BaseInterface } from "./base";
 import { BaseService, BaseCharacteritic, BaseApplication } from "./bluez-gatt";
 
+const Mode = Object.freeze({
+  SIM: Symbol("sim"),
+  ERG: Symbol("erg"),
+});
+
 export class FTMSService extends BaseService {
   UUID = "00001826-0000-1000-8000-00805f9b34fb";
   Primary = true;
@@ -30,6 +35,7 @@ class FTMSFeature extends BaseCharacteritic {
 }
 
 class FTMSControlPoint extends BaseCharacteritic {
+  mode = Mode.SIM;
   wind = 0;
   grade = 0;
   crr = 0;
@@ -57,10 +63,16 @@ class FTMSControlPoint extends BaseCharacteritic {
     } else if (value[0] === 0x01) {
       // reset machine
       this.notify([0x80, 0x01, 0x01]);
+    } else if (value[0] === 0x05) {
+      // set target power aka ERG mode
+      this.mode = Mode.ERG;
+      const power = view.getInt16(1, true);
+      this.notify([0x80, 0x05, 0x01]);
     } else if (value[0] === 0x07) {
       // start/resume
       this.notify([0x80, 0x07, 0x01]);
     } else if (value[0] === 0x11) {
+      this.mode = Mode.SIM;
       // set simulations param (wind, grade, etc)
       const wind = view.getInt16(1, true);
       const grade = view.getInt16(3, true);
@@ -72,13 +84,12 @@ class FTMSControlPoint extends BaseCharacteritic {
       this.crr = crr * 0.001;
       this.cw = cw * 0.01;
 
-      console.log(wind * 0.001);
-      console.log(grade * 0.01);
-      console.log(crr * 0.0001);
-      console.log(cw * 0.01);
-
+      console.log(
+        `wind=${this.wind} - grade=${this.grade} - crr=${this.crr} - cw=${this.cw}`
+      );
       this.notify([0x80, 0x11, 0x01]);
     } else {
+      this.notify([0x80, value[0], 0x02]);
       console.log("FTMS Control point op code " + value[0] + "not supported");
     }
   }
@@ -107,7 +118,7 @@ class IndoorBikeData extends BaseCharacteritic {
     this.Notifying = true;
 
     this.interval = setInterval(() => {
-      console.log("FTMS Notif Indoor Bike");
+      //console.log("FTMS Notif Indoor Bike");
       // 0x44 0x02 = fields included: cadence (2), power (6), hr (9)
       // 0x00 0x00 = average speed, always included
       // cadence is *2 (resolution 0.5 s^-1)

src/index.js

@@ -41,17 +41,22 @@ async function main() {
   await gattmgr.RegisterApplication("/eu/atoy", {});
   console.log("BLE GATT application registered");
 
-  return;
-
   const bz = new Bluez();
-  const pafers = await bz.getDevice("PAFERS_53B9A3");
+
+  console.log("Searching PAFERS device...");
+  const pafers = await bz.getDeviceByServiceUUID(
+    "72d70001-501f-46f7-95f9-23846ee1aba3"
+  );
 
   if (!pafers) {
+    console.log("Device not found");
     process.exit(1);
   }
 
+  const name = await pafers.getValue("Name");
   const iscon = await pafers.isConnected();
-  console.log("connected: " + iscon);
+
+  console.log("Found " + name + " (connected=" + iscon + ")");
 
   /*bz.on("interfacesAdded", () => {
 
@@ -61,6 +66,8 @@ async function main() {
     await pafers.connect();
   }
 
+  const char1 = await pafers.getCharacteristic("72d70003-501f-46f7-95f9-23846ee1aba3");
+
   return;
 
   const root = await bus.getProxyObject("org.bluez", "/");